Ricoh FT9101 - Page 261

9.4 Safety Notices for Flash Power Supply
High voltages of 1,070 to 2,000 V are applied to the xenon lamp (flash lamp) to produce light
immediately. Therefore, working near the xenon lamp is dangerous after removing the exposure
glass. Never work near the lamp without turning off the main switch and waiting at least 1 minute for
discharge.
Conditions for discharge of the flash power
For safety purpose, the power charged to light the xenon lamp is discharged under the following
conditions:
(1) When a "Service Call" or "Error Reset" condition is detected and the machine is stopped during
copying or operating with the free run mode in the service tools.
(2) When an original or copy paper jam occurs and the machine is stopped during copying or
operating with the free run mode in the service tools.
(3) When any doors are opened and the machine is stopped during copying or operating with the
free run mode in the service tools.
NOTE
When the above three conditions happen, the machine is stopped after an extra flash. The flash
power is discharged immediately.
(4) When the main switch is turned off.
(5) When the "Dis" (the flash discharge) key in service tool [5-04] "I/O test mode" is pressed.
NOTE
When the above two conditions happen, the flash power is discharged by the discharge circuit
built-in the flash power supply unit. In this case, it takes approximately 1 minute to complete
discharging.
CAUTION
Even in the copy stand-by condition, if the flash power is manually charged using the
"Charge" key in service tool [5-04] "I/O test mode" or the charge key (blue push switch )
installed in the flash power supply unit, be sure to discharge it by turning off the main switch
or using the I/O test mode before accessing the xenon lamp.
9.5 OPC Unit
• Set the OPC belt so the home mark is on the far side.
• Put far side of the OPC in the OPC sensor and set it in the center.
• Never touch the OPC surface, and position the OPC belt carefully to prevent bending it.
• Do not expose the OPC belt to daylight for more than a few minutes. When not installed, keep the OPC belt in its case
and store it in a cool, dark place. If copying is done while the exterior covers are off and in slight daylight, even after it is
set in the copier, the copy image becomes extremely light.
• Never use alcohol or other chemicals to clean the OPC.
• Because the slide guides have sharp edges, keep them in the main body while servicing.
1 July 1994 Safety Notices for Flash Power Supply
9-3